Research progress in green preparation of advanced wood-based composites

Since ancient times, humans have used wood as a building material due to its unique properties including porosity, anisotropy, biodegradability, and easy processing. Wood-based composites have been extensively studied in order to meet the performance requirements of the wood during use. However, the environmental burdens are steadily increasing due to the pollution in the synthesis of wood-based composites. At present, it has become a mainstream development trend to use environmentally friendly materials as raw materials and use adhesive-free bonding technology to prepare wood-based composites. Based on this green production, various environmentally friendly functional additives are widely mixed into raw materials to endow advanced wood-based composites with new practical functions such as electromagnetic shielding, antibacterial, and flame retardant. Hence, this paper summarizes the types of traditional wood-based composites and the pollution problems that exist in the preparation and application process, focusing on the green preparation technology and performance advantages of advanced wood-based composites. Among them, the adhesive-free hot-pressed technology is the most environmentally friendly method in the green preparation technology. Meanwhile, this paper looks forward to the development direction of advanced wood-based composites with new functions processed by green preparation technology. Furthermore, it will be upgraded towards the research of multi-functional integrated advanced wood-based composites in the future.

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